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 My understanding is that this rule only applies to a sump with a refugium containing chaeto, etc. I don't completely understand, but something to do with the oxygen release?? Bignose only has rock in his sump so it should not be an issue. 
				__________________  My 70 Gallon build: http://www.canreef.com/vbulletin/showthread.php?t=66478 My Mandarin Paradise: http://www.canreef.com/vbulletin/showthread.php?t=72762 I wonder... does anyone care enough to read signatures if you make them really small? I would not. I would probably moan and complain, read three words and swear once or twice. But since you made it this far, please rate my builds.   |